RHSA-2023:6380 - Security Advisory

Topic

An update for runc is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime.

Security Fix(es):

• golang: crypto/tls: large handshake records may cause panics (CVE-2022-41724)
• runc: Rootless runc makes `/sys/fs/cgroup` writable (CVE-2023-25809)
• runc: volume mount race condition (regression of CVE-2019-19921) (CVE-2023-27561)
• runc: AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration (CVE-2023-28642)
• runc: integer overflow in netlink bytemsg length field allows attacker to override netlink-based container configuration (CVE-2021-43784)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.3 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.4 x86_64
• Red Hat Enterprise Linux Server - AUS 9.4 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.4 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.4 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.4 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4 s390x

Fixes

• BZ - 2029439 - CVE-2021-43784 runc: integer overflow in netlink bytemsg length field allows attacker to override netlink-based container configuration
• BZ - 2175721 - CVE-2023-27561 runc: volume mount race condition (regression of CVE-2019-19921)
• BZ - 2178492 - CVE-2022-41724 golang: crypto/tls: large handshake records may cause panics
• BZ - 2182883 - CVE-2023-28642 runc: AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration
• BZ - 2182884 - CVE-2023-25809 runc: Rootless runc makes `/sys/fs/cgroup` writable

CVEs

• CVE-2021-43784
• CVE-2022-41724
• CVE-2023-25809
• CVE-2023-27561
• CVE-2023-28642

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.3_release_notes/index